PHP Question

Make new array in PHP

A have some little problem with array in PHP.

I have this array:

I have this array.

There are many ['variants'] below.

I need to create a new array like this:

new array like this

from all ['variants'].

I have a function with this

$variants = array();
$features = $features['18']; foreach ($features as $feature) {
if (!empty($feature['variants'])) {
$variants = array_merge($variants, $feature['variants']);
}
}
fn_print_r($variants);
return $variants;


But it have error:
array_merge()
[function.array-merge]: Argument #2 is not an array.

How can I fix this?

Answer

If you code correct - rewrite line 3:

if (!empty($feature['variants'])) {

on:

if (!empty($feature['variants']) && is_array($feature['variants'])) {

And I would give the call to array_values. For example:

foreach($features as $feature)
{
    $result = [];
    if(isset($feature['variants']) && is_array($feature['variants']))
    {
        $result = array_merge($result, array_values($feature['variants']));
    }
}
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